| Texto completo | |
| Autor(es): |
Lu, Ya
;
Chen, Chen
;
Roberts, Craig D.
;
Segovia, Jorge
;
Xu, Shu-Sheng
;
Zong, Hong-Shi
Número total de Autores: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | PHYSICAL REVIEW C; v. 96, n. 1, p. 11-pg., 2017-07-28. |
| Resumo | |
We describe a calculation of the spectrum of flavor-SU(3) octet and decuplet baryons, their parity partners, and the radial excitations of these systems, made using a symmetry-preserving treatment of a vector x vector contact interaction as the foundation for the relevant few-body equations. Dynamical chiral symmetry breaking generates nonpointlike diquarks within these baryons and hence, using the contact interaction, flavor-antitriplet scalar, pseudoscalar, vector, and flavor-sextet axial-vector quark-quark correlations can all play active roles. The model yields reasonable masses for all systems studied and Faddeev amplitudes for ground states and associated parity partners that sketch a realistic picture of their internal structure: ground-state, even-parity baryons are constituted, almost exclusively, from like-parity diquark correlations, but orbital angular momentum plays an important role in the rest-frame wave functions of odd-parity baryons, whose Faddeev amplitudes are dominated by odd-parity diquarks. (AU) | |
| Processo FAPESP: | 15/21550-4 - QCD Forte no Continuo: Massas e Estrutura Partonia de Barions |
| Beneficiário: | Chen Chen |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |